Magellan RoadMate 860T Reference Manual page 103

Bad fix code
0 PVT_OK :good fix
2 ILLEGAL_ALT: illegal altitude
4 POSITION_JUMP: too big position jump between two epoch (300 miles)
5 ILLEGAL_VELOCITY_OR_ALT: max velocity 951mile
7 TOO_BIG_ACCELERATION max 15m around 1.5g
8 TOO_SMALL_ALTITUDE
9 TOO_BIG_ALTITUDE
10 TOO_BIG_PDOP
11 SATS_BELOW_MASK_ANGLE satellite elevation angle is below mask angle
16 ILL_DEFINED_3D_MATRIX 3X3 matrix can not be inverted in 3D fix
17 ILL_DEFINED_2D_MATRIX
20 NO_SAT_TIME no satellite time
23 NOT_ENOUGH_SATS
24 CANNOT_SELECT_FIX_TYPE
30 VELOCITY_2D_ONLY
31 BAD_VELOCITY_PDOP
32 TOO_MANY_SATS_FOR_2D_VEL there are 4 or more satellites, but
51 WRONG_NUMSAT number of satellite for fix > 12 or less
56 LOOP_3D_NOT_CONVERGING 3D initial fix is not convergent
57 MILLISECOND_ERROR
58 LOOP_2D_NOT_CONVERGING
59 BAD_RANGE_CHITEST; range post-fix residuals chi-test failed
60 BAD_DOPPLER_CHITEST doppler post-fix residuals chi-test failed
61 OSC_DRIFT_ERR
62 BAD_DOPPLER_ERR
63 BIG_RANGE_RESID
64 BIG_DOPPLER_RESID 0.7m/s
65 HUGE_RANGE_RESID
66 HUGE_DOPPLER_RESID
Usually, Bad code is 0 and
2
< -10km or > 17.5km
-10000 m
17,500 m
max PDOP 50
X2 matrix can not be inverted in
2
no enough satellite for
satellite fix only for velocity, no position fix
2
50 too big pdop for velocity
millisecond jump happened
Dinitial fix is not convergent
2
too much clock drift 60HZ for XO, 7.5HZ for TCXO
too big Doppler errors 4m/s
110m/40m depend on virtual ttagl/ DGPS factors
10km normal for postfit residuals for range
100m/s normal for postfit residuals for doppler
3. If fix is good, it would be 0.
2
Appendix
D fix
2
D or 3D fix
2
D fix provided
2
2
94